Portable exercise device



FIG. 1 is a right perspective view of a portable exercise device, showing my new design in a condition of use;

FIG. 2 is a front elevation view shown in a condition of use thereof;

FIG. 3 is a rear elevation view shown in a condition of use thereof;

FIG. 4 is a right elevation view shown in a condition of use thereof;

FIG. 5 is a top plan view shown in a condition of use thereof;

FIG. 6 is a right perspective view shown at an enlarged scale thereof;

FIG. 7 is a top plan view shown at an enlarged scale thereof;

FIG. 8 is a bottom view shown at an enlarged scale thereof; and,

FIG. 9 is a side view shown at an enlarged scale thereof.

The broken lines in the drawings are for the purpose of illustrating environmental structure, which form no part of the claimed design. 

CLAIM The ornamental design for a portable exercise device, as shown and described. 